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In computing, A1 means Address 1 code.

An a1 code interpreter, by Matthew Newhook was used to test compiler output. It requires gcc 2.4.2 or higher and is portable to computers with memory segment protection.


See also:

This article (or an earlier version of it) contains material from FOLDOC, used with permission.

There are also several roads and freeways named the A1:

A1 freeway, Austria
A1 road, Britain from London to Edinburgh
A1 freeway, Cyprus
A1 freeway, France Paris to, (at the Belgian border)
A1 freeway, Germany
A1 road, Italy from Milan to Naples
A1 road, Northern Ireland from Belfast to Newry
A1 freeway, Poland
A1 freeway, Spain